package ningbo.annotation;

/**
 * @Author 宁铂
 * @Date 2021/7/29 18:35
 * @Version 1.0
 */
class   MyClass{
    public static void main(String[] args) {
        String str="ABCDE";
        System.out.println(str.substring(3));
        System.out.println(str.concat("XYZ"));
        System.out.print(str);
        int a[] = new int[3];
    }

}
